JP2019198178A - Rotating electric machine - Google Patents

Abstract

To further suppress movement and deformation of a stator core in a rotating electric machine.SOLUTION: Rotating electric machines (10, 10a, 10b) include a stator core (31) composed of a plurality of steel plates stacked along an axial direction (AD) and having a first through hole (33), housings (20, 20b), and fixing members (50, 50a, 50b) for fixing the stator core to the housings. The fixing members have fixing plates (60, 60a, 60b) in contact with the end face (34) of the stator core and formed with a second through hole (66) and a third through hole (68), a first fastening member (70) for fastening the stator core and the housings through the first through hole and the second through hole, a cylindrical member (80) inserted into the third through hole and in contact with the housings, and a second fastening member (90) that is inserted into the third through hole via the cylindrical member and fastens the fixing plates and the housings. The fixing plates are configured to be movable along the axial direction with respect to the cylindrical member.SELECTED DRAWING: Figure 3

Description

  The present disclosure relates to a rotating electrical machine.

  Conventionally, a rotating electrical machine having a stator core in which a plurality of steel plates are laminated has been used. In such a rotating electrical machine, the stator core and the housing may be fixed in the stacking direction using bolts. At the time of fixing, the stator core is compressed in the stacking direction by the axial force of the bolt, and the length in the stacking direction is shortened. At this time, due to the stator core having a laminated structure and non-uniform Young's modulus, variation in the amount of change in length along the lamination direction of the stator core may occur. In the rotating electrical machine described in Patent Document 1, the stator core and the housing are fastened at the front end side in the bolt insertion direction by placing a plate that contacts the inner peripheral surface of the housing on the end surface of the stator core and fixing the bolt, and inserting The stator core is fixed to the housing by a plate on the rear end side in the direction. This suppresses the movement and deformation of the stator core due to vibration during driving of the rotating electrical machine while suppressing the influence of variation in the length variation along the stacking direction.

Japanese Patent No. 4811114

  In the rotating electrical machine described in Patent Document 1, on the rear end side in the insertion direction, the stator core is fixed to the housing by the contact of the plate, so that the restraining force by the bolt is limited to the contact direction. For this reason, there has been a problem that the movement and deformation of the stator core due to vibration during driving of the rotating electrical machine are not sufficiently suppressed. Therefore, a technique capable of further suppressing the movement and deformation of the stator core has been demanded.

  This indication is made in order to solve at least one part of the above-mentioned subject, and can be realized as the following forms.

  According to one form of the present disclosure, a rotating electrical machine (10, 10a, 10b) is provided. The rotating electrical machine includes a rotor (40) and a cylindrical stator core formed of a plurality of steel plates stacked along the axial direction (AD) and formed with first through holes (33) along the axial direction. A stator (30) having (31); a housing (20, 20b) for housing the rotor and the stator; and a fixing member (50, 50a, 50b) for fixing the stator core to the housing; The fixing member is disposed in contact with the end surface (34) of the stator core in the axial direction, and is formed with a second through hole (66) and a third through hole (68) along the axial direction. (60, 60a, 60b); the first through hole and the second through hole are aligned and penetrated in the axial direction, and the stator core and the housing are fastened in the axial direction. A first fastening member (70); a cylindrical member (80) inserted into the third through-hole and having its end surface (81) in the axial direction in contact with the housing; and via the cylindrical member And a second fastening member (90) that is inserted into the third through hole and fastens the fixing plate and the housing in the axial direction; and the fixing plate is It is configured to be movable along the axial direction.

  According to the rotating electric machine of this embodiment, since the fixed plate is configured to be movable along the axial direction with respect to the cylindrical member, the stator core made up of a plurality of steel plates stacked along the axial direction, The influence of variation in the amount of change in length along the axial direction can be suppressed. Further, since the stator core can be fixed to the housing by the fixing member having the fixing plate, the first fastening member, the cylindrical member, and the second fastening member, it is possible to suppress the movement of the stator core due to vibration during driving of the rotating electrical machine, Deformation of the stator core can be suppressed. Moreover, since the 2nd fastening member is inserted in the 2nd through-hole 66 via the cylindrical cylindrical member, a fixing plate and a stator core can be restrained in the circumferential direction and radial direction of a cylindrical member. Therefore, a decrease in the fixing strength of the stator core can be suppressed as compared with a configuration in which the cylindrical member and the second fastening member are omitted and the fixing plate is brought into contact with the inner peripheral surface of the housing and restricted only in the contact direction. Further, movement and deformation of the stator core can be further suppressed.

  The present disclosure can be realized in various forms. For example, it is realizable with forms, such as a manufacturing method of an electric motor and a rotary electric machine, a fixing method of a stator core.

1 is a perspective view showing a schematic configuration of a rotating electrical machine as one embodiment of the present invention. It is A arrow directional view of FIG. It is sectional drawing which shows the cross section along the 3-3 line of FIG. It is sectional drawing which shows the cross section along line 4-4 of FIG. It is a disassembled perspective view which decomposes | disassembles and shows a rotary electric machine. It is an expansion perspective view which expands and shows a fixing member. It is a top view which shows schematic structure of the rotary electric machine of 2nd Embodiment. It is a disassembled perspective view which decomposes | disassembles and shows the rotary electric machine of 2nd Embodiment. It is a top view which shows schematic structure of the rotary electric machine of 3rd Embodiment. It is a perspective view which shows the rotary electric machine of 3rd Embodiment. It is a disassembled perspective view which decomposes | disassembles and shows the rotary electric machine of 3rd Embodiment.

A. First embodiment:
A-1. Device configuration:
The rotating electrical machine 10 shown in FIGS. 1 to 6 is configured as a so-called inner rotor type permanent magnet synchronous motor, and is mounted on a vehicle (not shown). 1, 2, 4 and 5, illustration of a cover 28 and a rotor 40 which will be described later is omitted. The rotating electrical machine 10 includes a housing 20, a stator 30, a rotor 40, and four fixing members 50. The housing 20, the stator 30, and the rotor 40 have the same axial direction AD. The axial direction AD is a direction parallel to the axis AX of the rotating electrical machine 10. In the following description, the axial direction AD is also referred to as a stacking direction.

  The housing 20 has a substantially cylindrical outer shape with a bottom, and accommodates the stator 30 and the rotor 40 therein. As shown in FIG. 3, the housing 20 includes a side surface portion 21 and a bottom portion 26. The side part 21 has a substantially cylindrical appearance. As shown in FIGS. 3 and 5, four concave portions 22 are formed on the inner peripheral surface of the side surface portion 21 so as to be arranged at equal intervals along the circumferential direction. Each recess 22 has a shape recessed in the radial direction, and is formed along the axial direction AD. As will be described later, each convex portion 32 of the stator core 31 is accommodated in each concave portion 22. A first fastening portion 23 is formed on an end surface of each recess 22 on the bottom 26 side. The 1st fastening part 23 is comprised as an internal thread, and is fastened with the front-end | tip part 72 of the 1st fastening member 70 mentioned later. Four fixed plate accommodating portions 24 are formed on the side opposite to the bottom portion 26 side in the axial direction AD from each concave portion 22. Each fixed plate accommodating part 24 is connected so as to correspond to each concave part 22 and is formed at equal intervals along the circumferential direction. A fixed plate 60 described later is disposed in the fixed plate accommodating portion 24. A second fastening portion 25 is formed on each end surface 201 in the axial direction AD of the fixed plate housing portion 24. The 2nd fastening part 25 is comprised as an internal thread, and is fastened with the front-end | tip part 92 of the 2nd fastening member 90 mentioned later. The bottom part 26 has a substantially disk-like appearance. An opening 27 is formed substantially at the center of the bottom portion 26. One end of the rotating shaft 45 of the rotor 40 is inserted into the opening 27 via a bearing 48. The side opposite to the bottom 26 side in the axial direction AD of the housing 20 is closed by a cover 28. The cover 28 has a substantially disk-like appearance. An opening 29 is formed in the approximate center of the cover 28. The other end of the rotating shaft 45 of the rotor 40 is inserted into the opening 29 via a bearing 49.

  The stator 30 has a substantially cylindrical appearance. A rotor 40 is disposed on the radially inner side of the stator 30. The stator 30 includes a stator core 31 and a stator coil 38. The stator core 31 has a substantially cylindrical appearance, and is composed of a plurality of steel plates stacked along the axial direction AD. Four convex portions 32 are formed on the outer peripheral surface of the stator core 31 at regular intervals along the circumferential direction. Each convex portion 32 has a shape protruding outward in the radial direction, and is formed along the axial direction AD. Each convex portion 32 is accommodated in each concave portion 22 of the housing 20. Each convex portion 32 is formed with a first through hole 33 penetrating in the axial direction AD. The shaft portion 71 of the first fastening member 70 is inserted into the first through hole 33. A fixed plate 60 is disposed in contact with one end face 34 of each convex portion 32 in the axial direction AD. On the radially inner surface of the stator core 31, a plurality of slots 37 are formed that are arranged at equal intervals along the circumferential direction. A stator coil 38 is wound around the slot 37. The stator coil 38 is composed of a three-phase coil including a U phase, a V phase, and a W phase.

  As shown in FIG. 3, the rotor 40 has a substantially cylindrical appearance. The rotor 40 is disposed inside the stator 30 in the radial direction via a gap G1. The rotor 40 has a rotor core 41 and a rotation shaft 45. The rotor core 41 has a substantially cylindrical appearance and is composed of a plurality of steel plates stacked along the axial direction AD. A plurality of permanent magnets (not shown) are embedded in the rotor core 41 on the side facing the stator core 31. The rotating shaft 45 has a rod-like appearance and is fixed to the radially inner side of the rotor core 41. One end of the rotating shaft 45 is inserted into the opening 27 via a bearing 48 and is rotatably fixed, and the other end of the rotating shaft 45 is inserted into the opening 29 via a bearing 49 and is rotatably fixed. .

  The four fixing members 50 fix the stator core 31 to the housing 20 respectively. As shown in FIG. 2, the four fixing members 50 are arranged side by side at equal intervals along the circumferential direction. As shown in FIG. 6, the fixing member 50 includes a fixing plate 60, a first fastening member 70, two cylindrical members 80, and two second fastening members 90.

  Each fixed plate 60 has a substantially rectangular plate-like appearance, and is disposed in each fixed plate accommodating portion 24 as shown in FIG. Each fixed plate 60 is disposed in contact with the end surface 34 of each convex portion 32 formed on the stator core 31. As shown in FIG. 6, in the following description, a surface of the fixed plate 60 that contacts the end surface 34 is also referred to as a contact surface 61, and a surface opposite to the contact surface 61 is also referred to as a non-contact surface 62. Call. Each fixed plate 60 is formed with a second through-hole 66 and two third through-holes 68 that are circular in cross-section and along the axial direction AD. The second through hole 66 is formed at a substantially center in the longitudinal direction of the fixed plate 60. The first fastening member 70 is inserted into the second through hole 66. The two third through holes 68 are formed at positions sandwiching the second through hole 66 along the circumferential direction. The position of the axial center of each third through hole 68 is located on the radially outer side of the stator core 31 with respect to the position of the axial center of the second through hole 66. A second fastening member 90 is inserted into each third through hole 68 via a tubular member 80. The fixed plate 60 is configured to be movable along the axial direction AD with respect to the cylindrical member 80. In the present embodiment, the fixed plate 60 is made of titanium.

  The first fastening member 70 fastens the stator core 31 and the housing 20 in the axial direction AD. As shown in FIG. 3, the first fastening member 70 is disposed through the first through hole 33 of the stator core 31 and the second through hole 66 of the fixing plate 60 in accordance with the axial direction AD. The first fastening member 70 is constituted by a bolt and has a shaft portion 71 and a head portion 75. The shaft portion 71 has a rod-like appearance and is inserted into the first through hole 33 and the second through hole 66. The shaft portion 71 has a tip portion 72 formed with a male screw on the side opposite to the head portion 75. The distal end portion 72 is inserted into and screwed into the first fastening portion 23 of the housing 20. The head 75 has a circular plan view shape having a diameter larger than that of the second through hole 66. For this reason, the head 75 and the non-contact surface 62 of the fixed plate 60 abut. A hexagonal hole used for fastening the first fastening member 70 is formed in the center of the head 75 in the radial direction. The hexagonal hole may be omitted, and the shape of the head 75 may be a hexagon.

  The two cylindrical members 80 each have a cylindrical appearance shape. Each tubular member 80 is press-fitted into each third through hole 68. As shown in FIGS. 3 and 4, the end surface 81 in the axial direction AD of the cylindrical member 80 is in contact with the end surface 201 in the axial direction AD of the housing 20 in the fixed plate housing portion 24 of the housing 20. Each second fastening member 90 is inserted into each tubular member 80. As shown in FIGS. 4 and 6, in the present embodiment, the length a of the tubular member 80 is configured to be larger than the thickness b of the fixed plate 60 in the axial direction AD. In the present embodiment, the cylindrical member 80 is made of stainless steel.

  The two second fastening members 90 fasten the fixing plate 60 and the housing 20 in the axial direction AD, respectively. Each second fastening member 90 is inserted into the third through hole 68 via the tubular member 80. The second fastening member 90 is configured by a bolt and has a shaft portion 91 and a head portion 95. The shaft portion 91 has a rod-like appearance and is inserted into the third through hole 68 via the tubular member 80. The shaft portion 91 has a distal end portion 92 formed with a male screw on the side opposite to the head portion 95. The distal end portion 92 is inserted into and screwed into the second fastening portion 25 of the housing 20. The head 95 is formed in a circular shape, and the end surface of the head 95 and the end surface of the tubular member 80 in the axial direction AD are in contact with each other. A hexagonal hole used when the second fastening member 90 is fastened is formed in the center of the head 95 in the radial direction. Note that the hexagonal hole may be omitted, and the shape of the head 95 may be a hexagon or the like.

  In the assembly of the rotating electrical machine 10 having the above-described configuration, when the stator core 31 is fixed to the housing 20 using the first fastening member 70, an axial force of the first fastening member 70 is generated. The stator core 31 having a stacked structure is compressed in the stacking direction, that is, the axial direction AD by the axial force of the first fastening member 70. For this reason, the length of the stator core 31 in the axial direction AD is shortened. Here, since the Young's modulus in the axial direction AD is not uniform in the stator core 31 having a laminated structure, variation in the amount of change in the length along the axial direction AD of the stator core 31 may occur. Further, since the stator core 31 has a low Young's modulus in the axial direction AD, the amount of change in length along the axial direction AD is large. For this reason, the variation in the amount of change in the length of the stator core 31 along the axial direction AD can be large.

  The rotating electrical machine 10 according to the present embodiment fixes the stator core 31 and the housing 20 by the fixing member 50, thereby suppressing the influence of variation in length variation along the axial direction AD of the stator core 31 while rotating the rotating electrical machine. The movement and deformation of the stator core 31 due to vibration at the time of driving 10 are suppressed. More specifically, the fixed plate 60 and the cylindrical member 80 are configured as separate members, so that the fixed plate 60 is configured to be movable along the axial direction AD with respect to the cylindrical member 80. For this reason, as will be described below, the influence of variations in the amount of change in length along the axial direction AD of the stator core 31 is suppressed.

  The first fastening member 70 penetrates through the first through hole 33 of the stator core 31 and the second through hole 66 of the fixed plate 60, and fastens the stator core 31 and the housing 20 in the axial direction AD. Further, the second fastening member 90 is inserted into the third through hole 68 of the fixed plate 60 via the cylindrical member 80 having a length a along the axial direction AD larger than the thickness b of the fixed plate 60. Yes. For this reason, as shown in FIG. 4, the contact surface 61 of the fixed plate 60 contacts the end surface 34 of the convex portion 32 of the stator core 31, but does not contact the end surface 201 of the fixed plate accommodating portion 24 of the housing 20. As described above, the second fastening member 90 fastens the fixed plate 60 and the housing 20 in the axial direction AD in a state where the gap G2 is provided between the contact surface 61 of the fixed plate 60 and the end surface 201 of the housing 20. is doing.

  When the length of the stator core 31 along the axial direction AD is relatively small, the gap G2 is smaller than the state shown in FIG. 4, and when the length of the stator core 31 along the axial direction AD is relatively large The gap G2 becomes larger than the state shown in FIG. On the other hand, the cylindrical member 80 is fixed to the housing 20 by a second fastening member 90. Therefore, the fixed plate 60 is fastened to the housing 20 in a state where it can move along the axial direction AD. With such a fixing mode, even when variations in the amount of change in the length of the stator core 31 along the axial direction AD occur, the influence of such variations can be suppressed and the stator core 31 can be firmly fixed to the housing 20.

  According to the rotating electrical machine 10 of the first embodiment described above, the fixed plate 60 is configured to be movable along the axial direction AD with respect to the tubular member 80, and therefore, along the axial direction AD of the stator core 31. The influence of variation in length variation can be suppressed. On the side where the cover 28 is disposed, the stator core 31 can be fixed to the housing 20 by the fixing member 50. In addition, on the bottom 26 side, the stator core 31 can be fixed to the housing 20 by the first fastening member 70. For this reason, the stator core 31 can be fixed to the housing 20 at both end faces of the stator core 31 in the axial direction AD. Therefore, it is possible to suppress the stator core 31 from moving in the radial direction due to vibration when the rotating electrical machine 10 is driven, and it is possible to suppress the stator core 31 from being deformed. Moreover, it can suppress that the stator core 31 moves to the circumferential direction and axial direction AD.

  Further, since the cylindrical member 80 has a cylindrical appearance and is inserted into the second through hole 66 of the fixing plate 60, the fixing plate 60 can be restrained in the circumferential direction and the radial direction of the cylindrical member 80. The movement of the stator core 31 can be suppressed.

  Here, in the configuration in which the cylindrical member 80 and the second fastening member 90 are omitted and the fixing plate is brought into contact with the inner peripheral surface of the housing, the first fastening member restrains the fixing plate only in the contact direction. The restraining force is weak, and the movement and deformation of the stator core due to vibration during driving of the rotating electrical machine cannot be sufficiently suppressed. Further, since the point contact is made in the contact direction, the first fastening member, the fixing plate, and the inner peripheral surface of the housing are likely to be worn, the binding force is reduced due to aging deterioration, and the fixing strength of the stator core is reduced.

  On the other hand, according to the rotating electrical machine 10 of the present embodiment, the fixing plate 60 can be restrained in the circumferential direction and the radial direction of the cylindrical member 80, so that the restraining force can be improved, and the stator core is caused by vibration when the rotating electrical machine 10 is driven. The movement and deformation of 31 can be further suppressed.

  In addition, since the stator core 31 can be further prevented from moving in the radial direction, the gap G1 between the outer peripheral surface of the rotor core 41 and the inner peripheral surface of the stator core 31 is prevented from being contracted by vibration during driving of the rotating electrical machine 10. it can. For this reason, it can suppress that the outer peripheral surface of the rotor core 41 and the inner peripheral surface of the stator core 31 contact, and the rotary electric machine 10 fails. Accordingly, since the gap G1 can be designed to be small in advance, the output of the rotating electrical machine 10 as a motor can be increased, and the deterioration of the performance of the rotating electrical machine 10 can be suppressed.

  In addition, since the stator core 31 is fixed to the housing 20 by the four fixing members 50 arranged at equal intervals along the circumferential direction, it is possible to suppress a reduction in the fixing strength of the stator core 31 to the housing 20. Further, since the four fixing members 50 are arranged side by side along the circumferential direction of the stator core 31 so as to include the axis AX of the stator core 31, the fixing strength of the stator core 31 to the housing 20 is along the circumferential direction. Unevenness can be suppressed, and radial movement of the stator core 31 can be further suppressed. Further, since each fixing member 50 has two cylindrical members 80 and second fastening members 90 with respect to one first fastening member 70, movement of the fixing plate 60 in the radial direction or circumferential direction of the stator core 31 is performed. The movement and deformation of the stator core 31 due to vibration during driving of the rotating electrical machine 10 can be further suppressed. Moreover, since the 2nd fastening member 90 is arrange | positioned along the circumferential direction of the stator core 31 in the position which pinches | interposes the 1st fastening member 70, the movement of the fixed plate 60 can further be suppressed and it is by the vibration at the time of the drive of the rotary electric machine 10. The movement and deformation of the stator core 31 can be further suppressed. Moreover, since it has the four fixed plates 60, the shape of each fixed plate 60 can be simplified and it can suppress that the manufacturing process of the fixed plate 60 becomes complicated.

  Moreover, as for the fixing member 50 of this embodiment, the fixing plate 60 is formed with titanium and the cylindrical member 80 is formed with stainless steel. Generally, the linear expansion coefficient of stainless steel is larger than that of titanium. For this reason, the increase rate of the length and volume accompanying a temperature rise is larger in the cylindrical member 80 than in the fixed plate 60. Therefore, the volume of the cylindrical member 80 is larger than that of the fixed plate 60 when the rotating electrical machine 10 that is in a high temperature state is driven than when the rotating electrical machine 10 that is in a normal temperature state is assembled. The restraining force during driving can be improved. For this reason, it is possible to further suppress the movement of the stator core 31 due to vibration during driving of the rotating electrical machine 10, and it is possible to further suppress the deformation of the stator core 31. Moreover, since the restraining force at the time of assembly can be reduced as compared with the time of driving the rotary electric machine 10, it is possible to suppress a decrease in the assembly performance of the rotary electric machine 10.

  Further, since the length a in the axial direction AD of the cylindrical member 80 is larger than the thickness b of the fixed plate 60, the fixed plate 60 can be easily configured to be movable along the axial direction AD with respect to the cylindrical member 80. it can. Further, since the length a of the cylindrical member 80 in the axial direction AD is larger than the thickness b of the fixed plate 60, the cylindrical member 80 extends over the entire axial direction AD in the third through hole 68 of the fixed plate 60. And the restraint force can be prevented from decreasing in a part of the axial direction AD. Moreover, since the cylindrical member 80 has a cylindrical external shape, the second fastening member 90 can be surrounded over the entire circumference, and the binding force is reduced in a part of the circumferential direction of the cylindrical member 80. Can be suppressed.

B. Second embodiment:
The rotating electrical machine 10a of the second embodiment shown in FIGS. 7 and 8 is different from the rotating electrical machine 10 of the first embodiment in that it includes a fixing member 50a instead of the fixing member 50. The fixing member 50a is different from the fixing member 50 of the first embodiment in that the fixing member 50a includes a fixing plate 60a instead of the fixing plate 60. Since the other configuration is the same as that of the rotating electrical machine 10 of the first embodiment, the same reference numeral is given to the same configuration, and detailed description thereof is omitted. 7 and 8, the rotor 40 and the cover 28 are omitted.

  The fixing member 50a has one fixing plate 60a. The fixed plate 60a has a ring-like appearance and includes four fixed portions 63a and four connecting portions 64a.

  The four fixing parts 63a are arranged at equal intervals along the circumferential direction. Each fixing portion 63a has the same configuration as the fixing plate 60 of the first embodiment, and one second through hole 66 and two third through holes 68 are formed. The four connecting parts 64a are connected to the fixing parts 63a along the circumferential direction, and connect the fixing parts 63a adjacent to each other in the circumferential direction. For this reason, the fixing member 50a of the second embodiment has a structure in which the four fixing plates 60 of the fixing member 50 of the first embodiment are connected to each other and integrated. As shown in FIG. 8, the contact surface 61 of the fixed plate 60a is located on the same plane in the fixed portion 63a and the connecting portion 64a. Further, the non-contact surface 62 of the fixed plate 60a is located on the same plane in the fixed portion 63a and the connecting portion 64a.

  The rotating electrical machine 10a of the second embodiment described above has the same effect as the rotating electrical machine 10 of the first embodiment. In addition, since the fixing plate 60a has four fixing portions 63a arranged side by side along the circumferential direction and a connecting portion 64a that connects the fixing portions 63a adjacent in the circumferential direction, the strength of the fixing member 50a. And a decrease in the fixing strength of the stator core 31 can be further suppressed. Therefore, movement and deformation of the stator core 31 can be further suppressed. In addition, since the fixing plate 60a is composed of a single member having a ring-like appearance, the strength of the fixing member 50a can be further increased, and a decrease in the fixing strength of the stator core 31 can be further suppressed. Further, since the strength of the fixing member 50a can be increased, the strength of the rotating electrical machine 10a by the housing 20 can be reduced, and the thickness of the side surface portion 21 of the housing 20 can be reduced. Moreover, since the fixed plate 60a is comprised with the single member, a number of parts can be reduced and the fall of an assembly | attachment property can be suppressed.

C. Third embodiment:
The rotating electrical machine 10b of the third embodiment shown in FIGS. 9 to 11 is different from that of the first embodiment in that a fixing member 50b is provided instead of the fixing member 50 and a housing 20b is provided instead of the housing 20. Different from 10. The fixing member 50b is different from the fixing member 50 of the first embodiment in that it has two fixing plates 60 and one fixing plate 60b. Since the other configuration is the same as that of the rotating electrical machine 10 of the first embodiment, the same reference numeral is given to the same configuration, and detailed description thereof is omitted. 9 to 11, for convenience of explanation, the external lead wire 99 is illustrated together with the rotating electrical machine 10b, and the rotor 40 and the cover 28 are omitted.

  The fixing member 50b has two fixing plates 60 and one fixing plate 60b. The two fixing plates 60 have the same configuration as the fixing plate 60 of the first embodiment. The fixed plate 60b has two fixed portions 63a and a connecting portion 64b. The two fixing parts 63a have the same configuration as the fixing part 63a of the second embodiment. The connecting portion 64b is connected to each fixing portion 63a along the circumferential direction, and connects the fixing portions 63a in the circumferential direction. The connecting portion 64b has an insulating portion 65b having electrical insulation.

  The insulating part 65b is formed on the non-contact surface 62 of the connecting part 64b. The insulating portion 65b is formed at a substantially central portion in the circumferential direction in the connecting portion 64b. The insulating portion 65b is formed by covering the connecting portion 64b with a material having electrical insulation. In the present embodiment, the insulating portion 65b is made of a rubber material, but may be made of any material having electrical insulation properties such as a resin material instead of the rubber material. The insulating portion 65 b is configured to be able to fix the lead wires 38 b of the three-phase coils of the stator coil 38 wound around the stator core 31. Each lead line 38b is connected to a terminal of the external lead wire 99, respectively. The external lead wire 99 supplies electric power supplied from an external power cable (not shown) to the rotating electrical machine 10b. That is, the insulating portion 65 b functions as a terminal block for electrically connecting the external lead wire 99 and the stator coil 38.

  The housing 20b is formed with a terminal accommodating portion 209b for accommodating the periphery of the terminal portion of the external lead wire 99 at a position corresponding to the external lead wire 99.

  The rotating electrical machine 10b of the third embodiment described above has the same effect as the rotating electrical machine 10a of the second embodiment. In addition, since the insulating portion 65b provided in the connecting portion 64b functions as a terminal block for electrically connecting the external lead wire 99 and the stator coil 38, in the stator 30 that vibrates when the rotating electrical machine 10 is driven, The lead wire 99 and the lead wire 38b of the stator coil 38 can be connected. For this reason, compared with the structure in which the terminal block is provided in the housing and the external lead wire 99 and the lead wire are connected in the housing, it is possible to suppress an excessive load from being applied to the lead wire 38b due to the vibration of the stator 30. It can suppress that leader line 38b cuts.

D. Other embodiments:
(D1) In each embodiment, although the 1st fastening member 70 was inserted in the 1st through-hole 33 formed in the convex part 32 of the stator core 31, the convex part 32 of the stator core 31 is abbreviate | omitted, for example, the stator core 31 The 1st through-hole 33 may be formed in the peripheral part of the radial direction outer side, and the 1st fastening member 70 may be inserted. Even with this configuration, the same effects as those of the above-described embodiment can be obtained.

(D2) The configuration of the fixing members 50, 50a, 50b in each embodiment is merely an example and can be variously changed. For example, in the rotating electrical machine 10 according to the first embodiment, the four fixing members 50 are arranged at equal intervals along the circumferential direction. However, instead of the four, any two, three, six, etc. The number of fixing members 50 may be arranged side by side along the circumferential direction, or may be arranged side by side at different intervals along the circumferential direction. For example, the aspect provided with the at least 3 fixing member 50 arrange | positioned along with the circumferential direction of the stator core 31 so that the axis line AX of the stator core 31 may be included may be sufficient. According to this aspect, it is possible to suppress the fixing strength of the stator core 31 to the housings 20 and 20b from becoming uneven along the circumferential direction.

  Further, for example, in the fixing member 50 of the first embodiment, each fixing member 50 has one first fastening member 70, but each fixing member 50 has two or more first fastening members 70. It may be. In addition, for example, in the fixing member 50 of the first embodiment, each fixing member 50 has the two cylindrical members 80 and the second fastening member 90, but each fixing member 50 has three or more cylindrical members. 80 and the second fastening member 90 may be included, and each fixing member 50 may include one cylindrical member 80 and the second fastening member 90. That is, generally, the fixing member 50 may include at least one first fastening member 70, two or more cylindrical members 80, and second fastening members 90. In addition, for example, the fixed plate 60 of the first embodiment has a substantially rectangular plate-like appearance, but may have any other shape, such as the cylindrical member 80 and the second fastening. You may have the shape according to the number and position of the member 90. FIG.

  Further, for example, in the fixing plate 60a of the fixing member 50a of the second embodiment, all of the four fixing parts 63a are connected by the connecting part 64a, but at least a part of the plurality of fixing parts 63a is connected. It may be. In the fixing plate 60b of the fixing member 50b of the third embodiment, the two fixing parts 63a are connected by the connecting part 64b, but three or more fixing parts 63a are connected by the connecting part 64a or the connecting part 64b. It may be. That is, generally, the fixing plate 60a is formed with a second through hole 66 and a third through hole 68, and a plurality of fixing portions 63a arranged side by side along the circumferential direction, and a plurality of fixing portions along the circumferential direction. A connecting portion 64a that is connected to the portion 63a and connects the fixing portions 63a adjacent in the circumferential direction may be included.

  Further, for example, in each embodiment, the fixing plates 60, 60a, and 60b are made of titanium and the cylindrical member 80 is made of stainless steel, but may be made of any metal material. For example, the fixing plates 60, 60a, 60b may be made of stainless steel, and the tubular member 80 may be made of aluminum. The fixed plates 60, 60a, 60b and the cylindrical member 80 may be made of the same type of metal material, and the linear expansion coefficients of the fixed plates 60, 60a, 60b and the cylindrical member 80 are the same. It may be. Further, the linear expansion coefficient of the fixed plates 60, 60 a, 60 b may be larger than the linear expansion coefficient of the tubular member 80. Even with such a configuration, the same effects as those of the above embodiment can be obtained.

  Further, for example, in each embodiment, the first fastening member 70 and the second fastening member 90 are configured by bolts having shaft portions 71 and 91 and head portions 75 and 95, respectively. It is not limited to. For example, it may be constituted by so-called stud bolts and nuts, or may be constituted by other arbitrary fastening members. Even with this configuration, the same effects as those of the above-described embodiment can be obtained.

(D3) The configuration of the cylindrical member 80 in each embodiment is merely an example and can be variously changed. For example, the length a of the cylindrical member 80 may be smaller than the thickness b of the fixed plates 60, 60a, 60b. In such an aspect, the outer diameter of the head 95 of the second fastening member 90 may be formed smaller than the diameter of the third through hole 68 formed in the fixing plates 60, 60a, 60b. Also according to this aspect, the fixed plates 60, 60 a, 60 b can move along the axial direction AD with respect to the cylindrical member 80. Further, for example, a mode in which a notch is formed in a part of the cylindrical member 80 in the circumferential direction may be employed. In this aspect, the circumferential direction of the cylindrical member 80 may be arranged differently for each of the plurality of cylindrical members 80. Further, for example, within a range in which the movement of the stator core 31 in the radial direction and the deformation of the stator core 31 can be suppressed, a slight gap may be provided between the tubular member 80 and the second fastening member 90. A slight gap may be provided between the shaped member 80 and the third through hole 68. Even with such a configuration, the same effects as those of the above embodiment can be obtained.

(D4) The rotating electrical machines 10, 10a, and 10b of each embodiment are configured as inner rotor type permanent magnet synchronous motors, but may be configured as other arbitrary synchronous motors or induction motors, and outer rotors. It may be configured as a mold type motor, and is not limited to an electric motor but may be configured as a generator. Moreover, although the rotary electric machines 10, 10 a, and 10 b of each embodiment are mounted on a vehicle, they may be mounted on an arbitrary moving body such as an airplane or a ship, not limited to a vehicle, and mounted on a moving body. It may replace with and may be installed in a fixed object.

  The present disclosure is not limited to the above-described embodiments, and can be realized with various configurations without departing from the spirit of the present disclosure. For example, the technical features in the embodiments corresponding to the technical features in the embodiments described in the summary section of the invention are intended to solve part or all of the above-described problems or to achieve one of the above-described effects. In order to achieve part or all, replacement or combination can be appropriately performed. Further, if the technical feature is not described as essential in the present specification, it can be deleted as appropriate.

10, 10a, 10b Rotating electric machine, 20, 20b Housing, 30 Stator, 31 Stator core, 33 First through hole, 34 End face, 40 Rotor, 50, 50a, 50b Fixing member, 60, 60a, 60b Fixing plate, 66 Second Through hole, 68 Third through hole, 70 First fastening member, 80 Cylindrical member, 81 End face, 90 Second fastening member, AD Axial direction

Claims (6)

A rotating electrical machine (10, 10a, 10b),
A rotor (40);
A stator (30) having a cylindrical stator core (31) formed of a plurality of steel plates laminated along the axial direction (AD) and having a first through hole (33) formed along the axial direction;
A housing (20, 20b) for accommodating the rotor and the stator;
A fixing member (50, 50a, 50b) for fixing the stator core to the housing;
With
The fixing member is
Fixed plates (60, 60a, 60, 60a, which are arranged in contact with the axial end face (34) of the stator core and have second through holes (66) and third through holes (68) along the axial direction. 60b)
A first fastening member (70) disposed through the first through hole and the second through hole in the axial direction so as to fasten the stator core and the housing in the axial direction;
A cylindrical tubular member (80) inserted into the third through hole and having its end surface (81) in the axial direction in contact with the housing;
A second fastening member (90) that is inserted into the third through hole through the tubular member and fastens the fixing plate and the housing in the axial direction;
Have
The fixed plate is configured to be movable along the axial direction with respect to the cylindrical member.
Rotating electric machine. In the rotating electrical machine according to claim 1,
The fixing member includes at least one first fastening member, two or more cylindrical members, and the second fastening member.
Rotating electric machine. In the rotating electrical machine according to claim 1 or 2,
Including at least three fixing members arranged side by side along the circumferential direction of the stator core so as to include the axis (AX) of the stator core;
Rotating electric machine. In the rotary electric machine according to any one of claims 1 to 3,
The fixing plate is
A plurality of fixing portions (63a) formed with the second through holes and the third through holes and arranged side by side along a circumferential direction of the stator core;
Connecting portions (64a, 64b) that are connected to the plurality of fixing portions along the circumferential direction and connect the fixing portions adjacent to each other in the circumferential direction;
A rotating electric machine. In the rotating electrical machine according to claim 4,
The connecting portion has an insulating portion (65b) having electrical insulation,
The insulating portion functions as a terminal block for electrically connecting the external lead wire (99) and the stator coil (38) wound around the stator core.
Rotating electric machine. In the rotary electric machine according to any one of claims 1 to 5,
The linear expansion coefficient of the cylindrical member is larger than the linear expansion coefficient of the fixed plate,
Rotating electric machine.

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